/Engine/Plugins/Experimental/GeometryCacheAbcFile/Source/GeometryCacheAbcFile/Public/GeometryCacheAbcFileSceneProxy.h
Find the two frames closest to the given time InterpolationFactor gives the position of the requested time slot between the two returned frames. 0.0 => We are very close to OutFrameIndex 1.0 => We are very close to OutNextFrameIndex If bIsPlayingBackwards it will return exactly the same indexes but in the reversed order. The InterpolationFactor will also be updated accordingly
virtual void FindSampleIndexesFromTime ( float Time, bool bLooping, bool bIsPlayingBackwards, int32 & OutFrameIndex, int32 & OutNextFrameIndex, float & InInterpolationFactor )